<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    {include file="common/header"}
</head>
<body>






<script>
    function f(x,y) {
        sum = x;
        if (x< y){
            x +1
            sum =sum +f(x,y);
            return sum
        }
    }


</script>

</body>
</html>